| 1 | // SPDX-License-Identifier: MIT |
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| 2 | #include <linux/pagemap.h> |
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| 3 | #include <linux/slab.h> |
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| 4 | #include <drm/ttm/ttm_tt.h> |
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| 5 | |
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| 6 | #include "nouveau_drv.h" |
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| 7 | #include "nouveau_mem.h" |
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| 8 | #include "nouveau_ttm.h" |
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| 9 | #include "nouveau_bo.h" |
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| 10 | |
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| 11 | struct nouveau_sgdma_be { |
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| 12 | /* this has to be the first field so populate/unpopulated in |
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| 13 | * nouve_bo.c works properly, otherwise have to move them here |
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| 14 | */ |
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| 15 | struct ttm_tt ttm; |
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| 16 | struct nouveau_mem *mem; |
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| 17 | }; |
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| 18 | |
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| 19 | void |
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| 20 | nouveau_sgdma_destroy(struct ttm_device *bdev, struct ttm_tt *ttm) |
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| 21 | { |
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| 22 | struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; |
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| 23 | |
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| 24 | if (ttm) { |
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| 25 | ttm_tt_fini(ttm: &nvbe->ttm); |
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| 26 | kfree(objp: nvbe); |
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| 27 | } |
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| 28 | } |
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| 29 | |
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| 30 | int |
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| 31 | nouveau_sgdma_bind(struct ttm_device *bdev, struct ttm_tt *ttm, struct ttm_resource *reg) |
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| 32 | { |
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| 33 | struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; |
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| 34 | struct nouveau_drm *drm = nouveau_bdev(bd: bdev); |
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| 35 | struct nouveau_mem *mem = nouveau_mem(reg); |
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| 36 | int ret; |
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| 37 | |
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| 38 | if (nvbe->mem) |
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| 39 | return 0; |
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| 40 | |
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| 41 | ret = nouveau_mem_host(reg, &nvbe->ttm); |
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| 42 | if (ret) |
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| 43 | return ret; |
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| 44 | |
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| 45 | if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) { |
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| 46 | ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]); |
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| 47 | if (ret) { |
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| 48 | nouveau_mem_fini(mem); |
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| 49 | return ret; |
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| 50 | } |
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| 51 | } |
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| 52 | |
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| 53 | nvbe->mem = mem; |
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| 54 | return 0; |
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| 55 | } |
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| 56 | |
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| 57 | void |
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| 58 | nouveau_sgdma_unbind(struct ttm_device *bdev, struct ttm_tt *ttm) |
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| 59 | { |
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| 60 | struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; |
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| 61 | if (nvbe->mem) { |
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| 62 | nouveau_mem_fini(nvbe->mem); |
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| 63 | nvbe->mem = NULL; |
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| 64 | } |
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| 65 | } |
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| 66 | |
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| 67 | struct ttm_tt * |
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| 68 | nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags) |
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| 69 | { |
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| 70 | struct nouveau_drm *drm = nouveau_bdev(bd: bo->bdev); |
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| 71 | struct nouveau_bo *nvbo = nouveau_bo(bo); |
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| 72 | struct nouveau_sgdma_be *nvbe; |
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| 73 | enum ttm_caching caching; |
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| 74 | |
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| 75 | if (nvbo->force_coherent) |
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| 76 | caching = ttm_uncached; |
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| 77 | else if (drm->agp.bridge) |
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| 78 | caching = ttm_write_combined; |
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| 79 | else |
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| 80 | caching = ttm_cached; |
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| 81 | |
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| 82 | nvbe = kzalloc(size: sizeof(*nvbe), GFP_KERNEL); |
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| 83 | if (!nvbe) |
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| 84 | return NULL; |
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| 85 | |
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| 86 | if (ttm_sg_tt_init(ttm_dma: &nvbe->ttm, bo, page_flags, caching)) { |
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| 87 | kfree(objp: nvbe); |
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| 88 | return NULL; |
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| 89 | } |
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| 90 | return &nvbe->ttm; |
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| 91 | } |
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| 92 | |
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